Cultivator.



v. LINDERBLAD.

Patented Apr. 18, 1915.

2 SHEETS-SHEET 1.

THE NORRIS PETERS 60.. FHOTC-LITHO.. WASHINGTON. D. c.

V. LINDERBLAD.

GULTIVATOR.

APPLICATION FILED NOV. 21, 1914.

Patented Apr. 13,1915.

ZBIIEETS-SH-EET 2.

THE NORRIS PETERS CO., PHOTO-LITHOY. WASHINGTON, n. c.

CULTIVATOR. i 1 s VICTOR LINDTEBLBLAD, O3? STOGKHOLM, $WEDEN.

treason.

Application filed November 21, 19145.

To all whom it may concern:

Be it known that T, VICTOR LINDEBBLAD, a citizen in the Kingdom ofSweden, residing at Kungsgatan 70, in the city of Stockholm, Sweden,have invented a new and useful Cultivator, of which the following is aspecification.

This invention relates to a cultivator the working parts of whichconsist of rotating wheels provided with. projections (knives, spades orthe like) on the rim, said projections being adapted to operate in thesoil in such a manner as to substitute plows, harrows etc. For thispurpose and for making the work easy so that it can be done economicallyat a low cost for the power used, the projections are disposed inseries, preferably two or more series on each wheel. In each series thefirst projection is straight. The other projections of each series arebent, some to the right and some to the left, the angle increasingsuccessively rearward so that the top of each projection reaches fartherfrom the vertical plane of the wheel than the foregoing projections ofthe same series. The projections may also be warped if nec essary. Theradial distance from the shaft of the wheel to the top of all theprojections may be equal so that all projections enter the soil to equaldepth, but preferably such distance should be decreasing rearward sothat the straight projection extends farthest.

In operation the straight projection which first comes into work cuts adeep score in the soil, the first bent projection works upon a narrowstring of soil immediately adjacent to said score on one side of it. Thesecond bent projection works upon a similar string on the other side ofthe score. The third bent projection works upon a new string of soilnext to the first one, the fourth bent projection upon another string ofsoil next to the second one and so on. Thus each projection has only anarrow string of soil to work upon, whereby the work will be easy andthe consumption of power small.

The rim of each wheel is preferably made in sections or se ments whichare fastened rigidly or otherwise to a hub passed on one or more rotaryhorizontal shafts. In the rigid type the connections between the hub andsaid segments may consist of spiders, crossed arms or the like and thesespiders or arms may also serve as connections between the segmentsthemselves. In the nonrigid type the connections between the hub andSpecification of Letters Tatent.

l atented Apr. T3, T915...

SeriaI No. 873,307.

the segments and between the segments themselves may consist of springsor the l ke.

One of the advantages attained by this construction is that a damagedwheel can be easily repaired at a low cost.

The nonrigid construction is intended to be used in soil, where stones,roots or other obstacles are immixed, and the object of thisconstruction is to enable the wheels to yield when engaging suchobstacles.

In the accompanying drawings, which show wo examples, Figure 1 is a sideView and Fig. 2 an axial section of a wheel of the rigid construction,while Fig. 3 is side view and Fig. 4 axial section of a wheel of thenonrigid construction. Figs. 5 and 6 show a suitable shape of the top ofthe teeth. Fig. 4t shows also the hubs of two other cultivating wheels.

(,4 is the rotary shaft, on which the hubs Z) of the wheels are passedso as to partake in the rotation.

In Figs. 1 and 2 the hub b has two pairs of crossed arms 1 6, one pai ateach end of the hub, which arms are fixed to the rim of the wheel bymeans of bolts and nuts or rivets or the like. The rim consists of ringsegments r. Each end of each arm is is connected to two segments 1" asshown.

The outer edge of each segment is split up into one or more series ofteeth or tongues. The first tooth of each series is straight, the othersare bent toward the sides, some to one side and the rest to the otherside, in such a manner that every bent tooth will reach to a point moredistant from the vertical plane of the wheel than the foregoing teeth ofthe same series. The radial distance of the teeth from their top to theaxis of the wheel is preferably so measured that this distance islargest at the straight tooth and successively diminishes toward theother end of the series. The straight tooth thus will make a deep scorein the soil and every following tooth will work upon a narrow string ofsoil next to the string worked by a foregoing tooth of the same series.In this way the resistance will be diminished and the work facilitated.

It will be evident that teeth bent to one side from an originallystraight line will not project so far from the axis of revolution of thewheel as when the teeth are straight. Consequently, the bent teeth areshown projecting a slightly less distance in the radial direction thanthe initial straight tooth in each series. In certain of the teeth thedifference 'in length is not noticeable but if the last tooth, which isbent farther to the side, is compared with the straight tooth which isthe first in the neXt succeeding series of teeth, the difference will beapparent. H

hen using a single row of wheels the length of the hub 'of each wheel isso measured that when the wheels are passed on the shaft so that thehubs touch each other, each wheel will work upon a string of soilimmediately adjacent to the string worked by the next wheel, so that nointermediate string will be left unworked.

When using two or more parallelshafts a eaclrhaving a row of wheels thehubs should'be' longer, so that the wheels of a following shaft willwork on strings of soil left untouched between the wheels of theforegoing shaft. i

In Figs. 3 and 4, where the segments are designated by a, the arms 70are substituted by Springs 7'' passed on'studs b on the hub and pressingon the inner edge of the segments or upon a base formed or fastenedthereon, the segments themselves being connected by other springs s soasto allow of yielding to some eXtent. Oblique springs 6 may be usedbetween the hub and the segments for preventing a too strong bending ofthe radial springs 7. By this construction the segments are adapted toyield for heavy stones or roots or other obstacles in the soil. lhisadaptability may be increased by passing other springs c on the shaft abetween the hubs Z) and said springs scan of course be used also'intherigid construction if desired.

It is obvious that one or more rows of yieldingwhe'els may be use'dsimultaneously, and that a rotary cultivator of either the rigid" typeor of the yielding type may be provided with or connected to plow-sharesor other means adapted to make furrows or the like in the cultivatedsoil;

The shaft or shafts a may be mounted in a frame movable up and down soas to adjust the depth and lift the wheels above the soil, when desired.It will be understood that the transmission to the shaft- 64 canbe'measure d so as to eifect a higher speed of this shaft and of thewheels thereon than the speed of the bearing or transporting wheels. Theshaft a may for instance maketen full turns while thebearing wheels makea single turn,so that the score made by the" straight tooth of oneseries will be immediately continued by the score made of the straighttooth of next series and no Copies of this patent may be obtained forfive cents each, by addressing the Commissioner of Patents uncut spacesbe left between them. Said transmission may be adjustable so as torender it possible to change the proportion between the speeds. Thecutting edge of the teeth may be sharpened as shown on the straighttooth in Figs. 5 and 6, at g.

It will be understood that I have shown and described the preferred formof em bodying my invention, but I contemplate all such modifications andrearrangements of the form shown and described herein as may be madewithout exercise of invention.

' What I claim is:

1. A wheel-like element for cultivating the soil comprising at least oneseries of teeth, the first tooth in each series being straight and theother teeth in the series being bent toward the side, some to one sideand the rest to the other side, in such a manner that every bent toothwill reach to a point more distant from the vertical plane of the wheelthan the foregoing teeth of the same series.

2. A wheel-like member for cultivating the soil comprising at least oneseries of teeth, the first tooth of each series being straight and theothers bent more or less to the side, some to one side and the rest tothe other, in such a manner that the distance from the aXis of rotationof the wheel to the outermost portion of the teeth decreases from thefirst tooth to the last one in each series.

A wheel-like element for cultivating the soil comprising in combinationa hub, a pluraiity of peripheral segments, r silicnt connections betweensaid segments and said hubs, and connections between said segmentspermitting relative motion thereof.

4. A wheel-like element for cultivating the soil comprising incombination a. hub, a plurality of peripheral segments, resilientconnections between said segments and said hubs, and resilientconnections between said segments.

' 5. A wheel-like element for cultivating the soil comprising at leastone series of tccth, the first tooth in each series being straight andthe other teeth being bent some to one side and the rest to the otherside, the ends of the bent teeth being turned inwardly so as to projectin the direction of the axis of rotation of the wheel.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

VICTOR LINDERBLAD.

Witnesses L. HOWELL, GncTA PRIEN.

Washington, ID. 0

